National Research and Education Network
Education Cloud Data Center
Multi-Channel HD Telemedicine Solution
Over The Top/Multi-Tenant Data Center (OTT/MTDC)
Internet Exchange Point (IXP)
Internet Access Provider (IAP)
Design & Simulation
Planning & Analytics
Oil & Gas IoT
HPC & Operations Management
Digital Urban Rail
Retail Cloud Platform
Enterprise Data Center
Enterprise Cloud Communications
Network Management System
Buy from Huawei
If you want to get more information about your project, you can submit your information and we will contact you as soon as possible.
If your company has signed an eDeal contract with Huawei, please buy your required product/solution via the link below.
Buy from resellers
Search for a nearby reseller and get direct contact information.
Become a Partner
Resources and Support
Huawei Authorized Learning Partner
Huawei Authorized Information and Network Academy
1. Analyze the caller IP phone logs, in the failed calls , the caller side sent out the invite message to U1980, after 11 seconds didn’t receive 180 message, then the caller side sent a Cancel message to release the call.
2. Analysis U1980 logs, U1980 have received the Invite message from Caller side and sent the invite message to called side, but without any response, then U1980 keep sending invite message to called user.
3. Analysis called side IP phone logs, the called user didn't receive U1980 invite message, confirm there is a network issue between U1980 and called side.
4. After customer fixed the network, the no ring back issue didn’t occur again.